This is a very remarkable passage. Perhaps the more literal version would be the following,—
16. In that day he will say to Jerusalem, “Fear thou not;
Sion! relaxed let not thy hands be:
17. He will rejoice over thee with joy;
He will renew thee in his love,
He will exult over thee with acclamation.”
The verb [יאמר] is rendered as above by the Septuagint, ερει, meaning the Lord. The last line but one is according to the Septuagint and the Syriac; and this sense has been adopted by Houbigant, Dathius, and Newcome. There is the difference only of one letter, [ד] for [ר], which are very alike. The law of parallelism is in favor of this meaning. The verse contains four lines: there is
an evident correspondence of meaning in the second and the last line; and so there is between the first and the third according to the preceding version, but not otherwise. The word rendered “acclamation” is a noun from the verb [רכה], to cry aloud, used at the beginning of verse 14.—Ed.